Re: Does 3.91 make the '91 fastest? (archive)

Mike,
I also have a 93 with the D'Sylva chip. I am also thinking about getting a taller rear end, maybe 4.10, and found your observation very usefull. Can you be a bit more specific about the Dinan gear set? I installed a Fahey cam sprocket in an M6 a few years back and found a slight increase in acceleration along with a slightly smother idle. I was hopeing the Dinan Cam would provide the same benifit. Your thoughts would be welcome.
Cheers

What is your opinion on the Cam gear set? Did you notice any significant differences in performance?

The final drive was made taller for '92 and '93. Is there any material difference in quater mile times or overall feel?

I have a '93 M5 with a 4.10:1 rear end. The original owner had Korman Auto Works switch gearsets. First gear is very short speed-wise, and I find that in town I am ususlly using gears 2-4. I still get ~ 20 mpg on the open road (I also have the Dinan cam sprocket and Mark D'Sylva's chip in the car). Keep the 3.71 or 3.91 unless you have a 6-speed. I will probably go to a 3.71 ratio with the Quafie LSD I have on the shelf. Remember, the M5 has considerable weight (compared to an M3), so off the line acceleration does put alot of strain on the drive train.

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